Everyone seems to be “maxxing” nowadays: looks-maxxing, brain-maxxing, fitness-maxxing — you name it, people are maxxing it. HBO Max started that trend a long time ago, though, bringing the “max” to its streaming service with a steady supply of hit blockbusters and intriguing indies. That continues in September with the recent addition of three movies that are at the top of Watch With Us’ binge list: the horror hit Backrooms, the underrated superhero spectacle Supergirl and the action flick Normal with Bob Odenkirk and Lena Headey.